37478217397 has 2 divisors, whose sum is σ = 37478217398. Its totient is φ = 37478217396.

The previous prime is 37478217379. The next prime is 37478217409. The reversal of 37478217397 is 79371287473.

37478217397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (37478217379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37187651281 + 290566116 = 192841^2 + 17046^2 .

It is a cyclic number.

It is not a de Polignac number, because 37478217397 - 2¹⁵ = 37478184629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37478217317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18739108698 + 18739108699.

It is an arithmetic number, because the mean of its divisors is an integer number (18739108699).

Almost surely, 2^37478217397 is an apocalyptic number.

It is an amenable number.

37478217397 is a deficient number, since it is larger than the sum of its proper divisors (1).

37478217397 is an equidigital number, since it uses as much as digits as its factorization.

37478217397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12446784, while the sum is 58.

The spelling of 37478217397 in words is "thirty-seven billion, four hundred seventy-eight million, two hundred seventeen thousand, three hundred ninety-seven".